Set of six three-branch cut glass 'Petal' Wall Lights by Osler

Set of six three-branch cut glass 'Petal' Wall Lights by Osler:
the lights on two tiers with spire ornaments either side; with leafy body and petal-edged candle pans typical of this famous firm; dressed with graduated festoons of 'single-star' prisms, pear-shaped pendants, and centre flower-shaped medallion. Circa 1860.